curl -X POST https://api.mycentralino.com/v1/contacts \
  -H "X-API-KEY: sk_mycentralino_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "number": "3331234567",
    "name": "Mario Rossi",
    "company": "ACME S.r.l.",
    "notes": "Cliente principale"
  }'

<?php
$data = [
    'number' => '3331234567',
    'name' => 'Mario Rossi',
    'company' => 'ACME S.r.l.',
    'notes' => 'Cliente principale'
];

$ch = curl_init('https://api.mycentralino.com/v1/contacts');
curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST => true,
    CURLOPT_POSTFIELDS => json_encode($data),
    CURLOPT_HTTPHEADER => [
        'X-API-KEY: sk_mycentralino_your_api_key',
        'Content-Type: application/json'
    ]
]);

$response = curl_exec($ch);
curl_close($ch);

print_r(json_decode($response, true));

import requests

headers = {
    'X-API-KEY': 'sk_mycentralino_your_api_key',
    'Content-Type': 'application/json'
}

data = {
    'number': '3331234567',
    'name': 'Mario Rossi',
    'company': 'ACME S.r.l.',
    'notes': 'Cliente principale'
}

response = requests.post(
    'https://api.mycentralino.com/v1/contacts',
    headers=headers,
    json=data
)
print(response.json())